.■i,~)(» IIS liKollI VI.l.ArK.K. (W AII:I!I.I:AK I'A.MIl.V.) 



V;ir. brevistylis, (imy. FlDworssinallor; stamens ami sUle not longer ^ 

 tiiaii till- corolla. — Alaliama (JJitckliy). 



5^2. ("os.MANTiil'S. — Orulis iiiiil srids 4 : vornlln not ii/i/n ml<i;/eil within, the 

 lolii s jiiiiliriiitf : jihiiiuiits hairi/ hcloir. 



2. P. Purshii, Hucklov. Stems erect or ascending, clusterecl, smooth 

 or liairv, liraiiclieil ; leaves iiirsnte ; the lower ones j)eti(»leil, almost pinnate, 

 the upper clasping, pinnatifid, with the loiies acute ; racemes manv-Howered ; 

 calvx lobes lanceolaiu-linear, hristly ciliate ; corolla IjIik;. (1'. fimbriata, 

 J'ltrsh.) — SU:\dy hanks in the upper districts. .May -June. — .Stem 8'- 12' 

 higii. Conjlla A' wide. 



3. P. fimbriata, .Michx. Smoothish or sligiitly hairy; stems spreading 

 or asctiidiiig; lca\es lew, ihe lowest ])etiole(l, with 3-5 roundisii leallcts; the 

 upper ones pinnately ."> - Tluhed, with the lolies obtuse; racemes 3-lOHow- 

 ered : calyx lol)es linear-oblong, obtuse; corolla white. — iligh mountains of 

 Nin-th I'arnlina. May. — .Stems 5' -8' long. 



\'ar. ^ Boykini, tiray. "More rol)Ust; racemes rather many-llowered, 

 at length strict, with fruiting pedicels erect and not longer than the calyx; 

 corolla far le.ss timbriate, bluish." — Upper Georgia (Boi/k-in). 

 § 3. Co.M.vNTiioiDKS. — Ovules conimonly more than 4 : corolla usually with 

 minute appendaijes within, the lobes entire. 



4. P. parviflora, I'ursh. Pube.scent; stems .several, spreading, branch- 

 ing; leaves pctioled ; the lowest 3-7-lobed. the upper 3-parted; racemes 

 loosely 5- l.")flowered; pedicels slender, much longer than the calyx; calyx 

 loi)es linear-obhnlg, bri.stly-ciliate ; corolla small, pale blue or white. — .Shady 

 banks, Georgia, and norilnvard. April -May. — Stems 3' -8' high. Corolla 

 3"-4" wide. Capsule few-seedeil. 



Var. hirsuta, (Jray. Morn hirsute, with stouter stems, and larger (5"- 

 7" wide) corolla. — Stone Mountaiti, Georgia. 



4. HYDROLEA, L. 



Calyx .5-parted. Corolla short, bell-shaped, 5-cleft; the lobes spreading. 

 .Stamens somewhat exserted. with the filaments dilated at the base : anthers 

 sagittate. Styles 2 (rarely 3), separate. Capsule globo.se, 2-celled, or imper- 

 fectly 4-celled by the introversion of the placentic, 2-valved. — Herbs, growing 

 in water or muddy places, with entire leaves, often with sj)ines in their axils, 

 and blue axillary or corymbose flowers. 



1. H. COrymbosa, Ell. Spineless; stem erect, hirsute and branching 

 above ; leaves ovatc-laiifeoiate, sessile ; flowers in a close terminal corymb ; 

 calyx lobes lanceolate, one third as long as the corolla. — Pine barren ponds, 

 Florida to South Carolina. July- Augu.st. — .Stem l°-2° high. Leaves V - 

 1 \' long. Corolla " azure, with yellowish veiits and 5 white spots near the ba.se." 



2. H. quadrivalvis, Walt. Spiny; stem ascending from a creeping 

 hase, iiispid, mostly sim].]e ; leaves lanceolate, tapering into a petiole; flowers 

 axillary, the lower ones du.stered, short-peduiicled ; calyx lobes linear, nearly 

 as long as the corolla; stamens induiled ; capsule almost 4-celled by the in- 

 troversion of the placenta;. — Pools and muddy banks. July -August. — 

 Stem 1^-3° long. Leaves 3' - 4' long. 



